30666644 has 6 divisors (see below), whose sum is σ = 53666634. Its totient is φ = 15333320.

The previous prime is 30666619. The next prime is 30666667. The reversal of 30666644 is 44666603.

It can be written as a sum of positive squares in only one way, i.e., 25200400 + 5466244 = 5020^2 + 2338^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3833327 + ... + 3833334.

It is an arithmetic number, because the mean of its divisors is an integer number (8944439).

Almost surely, 2^30666644 is an apocalyptic number.

It is an amenable number.

30666644 is a deficient number, since it is larger than the sum of its proper divisors (22999990).

30666644 is a wasteful number, since it uses less digits than its factorization.

30666644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7666665 (or 7666663 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 35.

The square root of 30666644 is about 5537.7471953855. The cubic root of 30666644 is about 313.0079853155.

The spelling of 30666644 in words is "thirty million, six hundred sixty-six thousand, six hundred forty-four".